The strain softening characteristics analysis of 12Cr1MoV streel friction welding pipe joints.which were removed from heating apparatus pipes ager over 9 and is yearly of service, was undertaken. It is concluded that ...The strain softening characteristics analysis of 12Cr1MoV streel friction welding pipe joints.which were removed from heating apparatus pipes ager over 9 and is yearly of service, was undertaken. It is concluded that the evident softening did not occur in the weld metal and HAZ during serice. whereas it did in the base metal 2mm apart from the center of the weld metal. The difference is due to the restriction of the pipe hoop, which is formed on the joint during friction welding. The bainite. microstructure in the weld metal and HA Z, which is harder than the pearlite, pecrostpucture in the base metal, makes contpibution too. ThIS phenomenon is peculiar to the friction weldings pipes.展开更多
The history of the development of the tube ＆ pipe division of Baosteel was reviewed in the article, focusing on the process of technical innovation and the product category enrichment. Thanks to the technical innovat...The history of the development of the tube ＆ pipe division of Baosteel was reviewed in the article, focusing on the process of technical innovation and the product category enrichment. Thanks to the technical innovation, the Ф 140 product line has become the most efficient one in the world. With the advance of conglomeracy and the construction of the most advanced weld pipe line and the Ф460 premium quality finishing （PQF） line ,the catalogue of Baosteel tube ＆pipe products has covered the extensive range from the hot roll to cold roll, the seamless to the welded, and all of the product dimension scope from 25.4 mm to 610 ram. To meet the requirements of relevant industries such as energy ,transportation, machinery,ammunition and other relevant industries, the product variety is diverting from carbon steel to alloy steel, stainless steel and special alloys. As the Baosteel Steel Tubing Plant increased its number of production units, expanded its production capacity and developed new products ,it has grown into a pipe and tube supplier with global competitiveness.展开更多
文摘The strain softening characteristics analysis of 12Cr1MoV streel friction welding pipe joints.which were removed from heating apparatus pipes ager over 9 and is yearly of service, was undertaken. It is concluded that the evident softening did not occur in the weld metal and HAZ during serice. whereas it did in the base metal 2mm apart from the center of the weld metal. The difference is due to the restriction of the pipe hoop, which is formed on the joint during friction welding. The bainite. microstructure in the weld metal and HA Z, which is harder than the pearlite, pecrostpucture in the base metal, makes contpibution too. ThIS phenomenon is peculiar to the friction weldings pipes.
文摘The history of the development of the tube ＆ pipe division of Baosteel was reviewed in the article, focusing on the process of technical innovation and the product category enrichment. Thanks to the technical innovation, the Ф 140 product line has become the most efficient one in the world. With the advance of conglomeracy and the construction of the most advanced weld pipe line and the Ф460 premium quality finishing （PQF） line ,the catalogue of Baosteel tube ＆pipe products has covered the extensive range from the hot roll to cold roll, the seamless to the welded, and all of the product dimension scope from 25.4 mm to 610 ram. To meet the requirements of relevant industries such as energy ,transportation, machinery,ammunition and other relevant industries, the product variety is diverting from carbon steel to alloy steel, stainless steel and special alloys. As the Baosteel Steel Tubing Plant increased its number of production units, expanded its production capacity and developed new products ,it has grown into a pipe and tube supplier with global competitiveness.
